Rivet setting and removing tool



Oct. 29, 1940 H. P. R. MILBERG 2,219,531

RIVET SETTING AND REMOVING TOOL Filed June-23, 193a \Illiiiii 23 HERMAN 19m Mme-Ra Patented Oct. 29, 1940 UNITED STATES PATENT, OFFICE 1 Claim.

This invention relates to a rivet-setting and removing tool and has for one of its objects the production of a light, portable and inexpensive tool for setting and removing rivets and particularly the rivets of mower and binder sickle bars.

A further object of this invention is the production of a tool wherein the mower bar and the like may be held in a position upon the anvil in a manner whereby the rivet-head may be easily formed and the Weight and force of the head forming blow will be taken up entirely by the rivet and not the sickle, the upper face of the anvil being so formed as to hold the sickle away from the upper face of the anvil.

Another object of this invention is the production of a simple and efficient means for facilitating the shearing off of the heads of rivets and the like, to facilitate the replacement of cutter blades of a mower bar and the like.

Other objects and advantages of the present invention will be obvious throughout the following specification and claim.

In the drawing Figure 1 is a side elevational view of the tool, 26 certain parts being shown in vertical section;

Figure 2 is a vertical sectional View taken on line 2--2 of Figure 1;

Figure 3 is a horizontal sectional view taken on line 3-3 of Figure 1;

Figure 4 is a fragmentary perspective view of the forward end of the anvil portion of the tool;

Figure 5 is a fragmentary side elevational view of a portion of the anvil portion of the tool, showing the manner of shearing ofi the head of a rivet;

Figure 6 is a transverse sectional view of the anvil portion of the tool and illustrating the manner of punching out a rivet from a mower bar and the like.

By referring to the drawing, it will be seen that IE] designates the body of the tool which comprises an anvil portion, or base ll, having a rectangular depending anchoring pin I2-which is adapted to fit into a support such as a vise or other suitable means. The anvil portion or base 1 II is provided with an upwardly extending and forwardly curved neck [3 which carries a vertically extending sleeve M.

A plunger I5 is slidably mounted in the sleeve I 4 and extends vertically and above the sleeve M. A coil spring [6 is carried by the plunger I5 and engages the top of the sleeve M at its lower end and the upper end of the spring l6 engages a cotter pin I! to normally urge the plunger l5 upwardly. A cotter pin I8 is carried near the lower end of the plunger I5 to limit the upward movement of the plunger I5. The lower extremity of the plunger I5 is provided witha rivet head forming socket l9, as shown in Figures 1 and 2.

The anvil portion or base II is provided with a rivet receiving socket 20 formed in its upper face just below the socket IQ of the plunger l5 and the upper face 2| of the anvil portion II is rounded upwardly and transversely, as shown in Figure 2, thereby producing a convex or oval upper face 2| which recedes away from the socket 29 upon either side of the socket 20. Because of this structure, a sickle bar and the like may be placed transversely of the face 2|, allowing the rivet to fit within the socket 20, as shown in Figures l and 2, and hold the bar 22 shown in dotted lines out of contact with the upper face of the anvil portion N. All parts of the sickle bar will be held out of contact-with the anvil except the rivet which is being set and the rivet will be set straight, even though the sickle might not be held exactly level.

The forward end of the anvil portion is provided with a cut-out flattened shelf portion 22, and an abrupt corner 23 upon which the head of a rivet may be placed, as shown in Figure 5, and by striking the upper edge of the blade 26 which extends above the bar 24 with a hammer, the rivet may be sheared off at its junction with the bar 24 and blade 26. The opposite side upper corner edges of the shelf portion 22 are provided with vertical sockets or notches 25 to facilitate the removal of rivets, as shown in Figure 6, after the heads have been sheared off.

By means of the present device, an operator may hold a mower sickle or bar in one hand upon the anvil portion of the tool, and this will leave the other hand free to set the rivet and to actuate the plunger. The device may be fastened in a vise block of wood or to a blacksmiths anvil, in the conventional manner, or may be supported in any suitable or desired manner, without departing from the spirit of the invention. Through the medium of the present device,- an inexperienced workman is enabled to perform a factory job of riveting both quickly and easily, and without the necessity of employing complicated and expensive machinery. Sickle blades may be easily removed by shearing off the rivet heads and punching out the old rivets in the manner shown in Figures 5 and 6, in this way facilitating the repair or replacement of the worn out parts. The neck portion I3 of the tool is so constructed as to allow suflicient space for being set therein, the base portion having a shallow rivet-receiving socket in alignment with the plunger socket, the socket in the base portion being of a depth to support a rivet-carrying sickle bar above the base portion, and the upper face of the base portion being convex in contour and sloping laterally away from the rivet-receiving socket and extending in a horizontal plane at right angles to the convex contour whereby the entire weight upon the base may be carried by the rivet adapted to be placed within the rivetreceiving socket of the base portion to support a sickle bar away from the base portion and prevent the bending of the sickle bar while blades are being riveted upon the bar and as the bar extends transversely of the convex contour of the base.

HERMAN P. R. MILBERG. 

